Furnace.



No. 002,200. Patented Jah. 30, |900.

0. Rumsm.

FUHNACE.

(Application f11ed Apr. 1B, 1899.)

(No Model.) 2 Sheets-Sheet l,

g. flu",

Patentedlan. 30, |900. R. RUETSCHI.

F U R N A C E (Application filed Apr. 18, 1899.)

2 Sheets-Sheet 2...

(Nd Model.)

W/ TNE SSE S m E N w T T A 'raras PATENT OFFICE,

RUDOLPH RUETSOHI, OF ARGENTINE, KANSAS.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 642,260, dated January30, 1900.

Application filed April18, 1899. Serial No. 713,460. (No'modcl.)

T0 all whom it may concern:

Be it known that l, RUDOLPH RUn'rsoHI, of Argentine, in the county ofVyandotte and State of Kansas, have invented certain new and usefulImprovements in Furnaces, of which the following is a full, clear, andexact description.

The object of the invention is to provide certain new and usefulimprovements in boiler and other furnaces, whereby the fuel isconveniently introduced as needed, to insure proper and completecombustion in the fire-box in a very economical manner, and wherebyproper repairs of the working grate can be made at any time and whilethe furnace is in use.

The invention consists of novel features and parts and combinations ofthe same, as will be fully described hereinafter and then pointed out inthe claims.

A practical embodiment of my invention is represented in theaccompanying drawings, forming a part of this specication, in whichsimilar characters of reference indicate corresponding parts in all theviews.

Figure l is a sectional side elevation of the improvement on the line 1l in Fig. Fig. 2 is a transverse section of the grate on the line 2 2 inFig. l. Fig. 3 is a sectional front elevation of the improvement on theline 3 3 in Fig. l; and Figs. Il, 5, and 6 are sectional side elevationsof modified forms of the grate.

The furnace is built of the usual brickwork A and is provided with afire-box B, having an ash-pit B', of which the side walls support railsU for wheels D to travel on, said Wheels being journaled in a frame E,in which are journaled transversely-extendin g shafts F F', carryingsprocket-wheels G G, over which passes an endless grate H for supportingthe fuel on the upper run and for discharging the ashes, as hereinaftermore fully described.

As indicated in Figs. 1, 4, and 5, the grate H is arranged in aninclined position; but it may be disposed horizontally, as illustratedin Fig. 6. The grate, as shown in Figs. l and 2, is provided withgrate-bars H,`pivoted on links H2, alternating with links H3, whichlinks form sprocket-chains passing over sprocket-wheels G G', secured onthe shafts F F', respectively. The grate-bars H' are preferably madeapproximately L-shaped, as indicated in Fig. l, and are formed withslots for the passage of air to insure proper cornbustion and also toallow ashes to drop through the slots to the ash-pit B below the grate.

The grate-bars H when on the upper run are disposed in step form, themain portion thereof extending horiz'ontally,the upwardly`- bent endresting on a link H3, said upwardlybent end being under the horizontalportion of the following grate-bar Il. The fuel is discharged upon theupper run of the gratebars from a hopper I, having two gates I I2, oneat the rear end and one at the bottom, to allow of regulating the supplyof fuel to the said grate-bars.

At the inner end of the grate H-that is, opposite the wheel G'-isarranged a firebridge J, made of longitudinally-spaced segmental ribsconcentric with the wheel G, said tire-bridge forming a resting-placefor the rear ends of the grate-bars H/ as the latter pass around thewheel G' from the upper run of the grate to the lower run, said gratesin swinging on their links H2 striking against said fire-bridge toinsure a proper dumping of the ashes contained on the grate-bars.Furthermore, the said fire-bridge J allows the grate-bars H to swingslowly from their vertical position on their upper run into an approximatelyvertical position on their lower run.

A table K extends under the upper run of the grate H near the wheel G,so that any coal-dust falling through the grate-bars at this pointaccumulates on said table and nally passes over the lower end thereofupon a forwardly and upwardly inclined deflecting-plate L, attached tothe framework E, the same as the table K. By this arrangement thecoal-dust falling through the uppermost grate-bars on the upper run ofthe grate is prevented from mixing with the ashes discharged from thegrate-bars as the latter proceed on their downward journey farther intothe fire-box B. The table K further serves to partially exclude air frompassing to the grate-bars at or near the upper end of the upper run, tocause coking of the fuel shifted from the hopper I, before the fuel isburned by the admission of air passing to the gratebars below thedeiiecting-plate L and at the time the grate-bars have advanced to aboutthe middle of the fire-box B'.

It is understood that when the furnace is in operation the fuel on thelowermost gratebars of the upper run burns briskly under IOO admissionof air passing in an upward and inward direction from the front lowerend of the fire-box under the plate L, while the fuel on4 the uppermostgrate-bars of said upper run is coked under a partial exclusion of air,so that this coked fuel will readily ignite as the grate-bars advance inthe fire-box in a downward and inward direction. The burning fuel on apreceding bar readily ignites the fuel on the following grate-bar,especially, as the following grate-bar islocated somewhatV higher thanthe preceding one, as will be readily understood by reference to Fig. 1.

The ashes from the burning fuel readily pass through the slots in thegrate-bars and drop into the ash-pit B', and any ashes left on thegrate-bars is finally dumped therefrom at the time the grate-bar swingsover and strikes the fire-bridge J. The grate bars upon passing in adownward direction on the lower run of the grate hang loosely and in anapproximately vertical position, and as these grate-bars pass throughthe current of air rising upward and inward in the fire-box saidgrate-bars are cooledv to a considerable extent before receiving a freshsupply of fuel when passing under the hopper I, and after they havepassed to the upper run of the grate around the wheel G.

The outer end of the shaft F is connected with suitable machinery forimparting a'slow rotary motion to said shaft to rotate thesprocket-wheel G and cause the grate H to travel in the direction of thearrow a', as indicated in Fig. l. As the grate-bars H on the lower runof the grate hang vertical, sufiicient space is left between adjacentgratebars to form passages for the dropping ashes from the grate-bars onthe upper run.

A front N is attached to the frame E, and is provided with a hinged doorN' for giving convenient access to the grate-bars and thesprocket-chains at the time they pass around the wheel G, so thatrepairs can be readily made on any one of the grate bars or links ofthechains during the passage of the same around the wheel G. As the gatetravels very slowly it is evident that such' repairs can be made withoutstopping the rotation of theshaft F. The front N is further providedWith a door N2, extending down into the ash-pit B', to close the frontend thereof. The side edges of the front N reach toa fixed casing O,which supports the hopper I and abut against the f rontof the brickworkA, to completely close the front end of the tire-box,

When it is desired to have access'to the fire-box or other parts of thefurnace, it is only necessary to run the frame E, with its grateandfront outer end, on the rails C to allow'of cleaning the furnace andalso the grate, if necessary.

I do not limit myself to the peculiar form of grate-bars shown .in Figs.l and 2, asl the same may be varied. For instance, as shownV in Fig'. 4,the grate H4 has its L--shapedl gratebars H5 provided with lugs H6 atthe pivot end to form a support for the next following' grate-bar, aswill be readily understood by reference to the said figure. In Fig. 5the grate H7 has grate-bars H8, made flat, with small lugs H1 at therear ends to abut against the link H10 for supporting the next followinggrate-bar. The grate may also be arranged with its upper and lower endshorizontal, as indicated in Fig. 6, and in this case the grate H11 hasgrate-bars H12, which are `iiat and form a continuous surface when atthe topvrun of the endless grate to properly support the fuel. Thegrate-bars H12 strike vagainst the fire-bridge J when moving from theupper run' to the lower run at the inner end of the grate'to properlydischarge the ashes, as previously-explained.

Having thus'fully described my'invention,

I claim as new and desire to secure by Letters Patent- Y I 1. Afurnaceprovided with a fire-box, and

an endless traveling grate having pivoted grate-bars arranged to form acontinuous support for the'fuel at the upper run of the traveling grate,and to form open spaces between adjacent grate-bars at the lower run ofsaid grate for the passageof ashes and coal-dust, said grate beingarranged in an inclined position, the grate-bars being arranged in stepform on the upperrun, substantially as shown and described.

2. A furnace provided with a fire-box, an endless traveling grate havingpivoted gratebars arranged to form a continuous support for the fuel atthe upper run of the traveling grate', and to form open spaces betweenadjacent grate-ba'rs at the vlower run of said grate for the passage ofashes and coal-dust, a table under part of the upper run at the front orfuel-receivin'g'end thereof, and a defleeting-plate extending/downwardlyand forwardl y between the upper land lower Arunsand below the lower endof said table, substantially as shown and described.

3. lnafurnace, the combination of an'inclined traveling grate mounted'inthe tire-box, and means mounted beneath the outer portion of said grate,such means receivingthe coal-dust from the grate and carrying theRUDOLPH RUETsoH'I.

Witnesses:

JUDD STEWART, REYNORD P. REEsE."

IOO

